Yay for progress! Thanks to everyone who helped me/gave suggestions/etc. :) Those comments made me feel so much better through this whole "not knowing" process!
So I got some pics of Berto's eye. :)
1.5 weeks after the diagnosis was made and medication was started:
Basically he's all healed up but the vet still wants me to keep putting the ointment in his eye until it runs out. :)